Rubber-dam clamp.



F. H. NEWLIN.

RUBBER DAM CLAMP.

APPLICATION FILED APR.20, l9i5- 1,166,924. Pafented Jan. 1916. I

WITNESSES To all whom it may concern:

marten erairns iearnr FREEMAN n. NEWLIN, or nuN'rrNenoN, rENNs'zLvANra,ASSIGNOR so JAMES w.-

IVORY, onrnrnennnrnra. PENNSYLVANIA.

1 RUBBER-DAM CLAMP.

ncense.

Be it known that I, FREEMAN II. NnwLnN,

a citizen of the United States, residing in.

the city and county of I-Iuntingdon, State of Pennsylvania, haveinvented a new and useful Rubber-Dam Clamp, of which the following is aspecification. 7

My invention consists of a rubber dam clamp in which provision is madefor bold ing the dam firmly on said clamp while it forms a wall whichefliciently closes around a tooth on which an operation is to be per:formed.

The invention is satisfactorily illustrated in the accompanyingdrawings, but the important instrumentalities thereof may be varied, asvlong as they are included in the scope of the claim.

Figures 1, 2 and 3 represent perspective views of rubber dam clampsembodying my invention. Figs. & and 5 represent perspective views ofportions of rubber dam clamps showing other embodiments of my invention.Fig. 6 represents a perspective View.

of a rubber dam clamp showing another embodiment of my inventionincluding a rubber dam in operative position thereon.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, 1 designates the jaws of the clamp, and 2designates a resilient bridge or bow connecting the same, said membersper se being known in the art. Connected with said bridge are the arms3, which in Figs. 1, 3 and 6 are formed of the metal or material of saidbridge integral therewith. V

In Fig. 2, the bridge is adapted to have arms formed of wire attachedthereto, one of said arms being omitted. Connected with the jaws larethe arms a which in Figs. 1, 2, 4, and 5 are formed of wire, and inFigs. 3 and 6 said arms are formed of sheet metal or the material ofsaid jaws integral therewith.

It will be noticed that the arms 8 and 4c comprise comparatively thecorners of the clamps and on the ends of said arms are the salientpointed hooks 5, formed by suitably bending or otherwise shaping themetal or material of the arms at said ends. 7

On the outer sides of the jaws of the clamps are the tongues 6 whichextend at an angle from said sides, the same being adapted to have arubber dam attached thereto by being stretched over the same, itbeing-also stretched over and upon the hooks 5. A proper implement suchas forceps is en'- Spec ification of Letters Patent. U Patented'Jan. 4,1916, AppIioation fi1edApril20, 1915. Serial No. 22,555. i l i gaged inthe openings 7in the jaws and the latter are spread apart by'the sameand carried on a tooth, the dam owing to the openmg previously madetherein passing over.

the tooth it having been previously drawn. at the proper place overthepointed hook. Then the dam is stripped from the tongues 6 when itcontracts and closes around the neck of the tooth and the dam is firmlyheld in position for the purpose of an opera;

tion on the tooth.

In Big. {L I show the jaw provided with a plurality of openings 8 ineither of which the inner end of the arm may be received and adjustedonthe clamp according to-requlrements, said end after passing through thedesired opening being bent on the clamp as at 9 and so .held in positiontightly thereon.

In Fig. 2, I show the bridge'2 as provided with aplurality of openings10 for connection therewith of the arms 3, similar to theconnection ofthe arms 4 with the jaws as in Fig. 4.

Referringto Fig. 4, the face of the clamp between the openings 8 aresunken forming the recess 11, in which is seated the right lined portion12 of the arm'4, whereby the walls of said recess embrace said portion12., the terminal of the arm being bent and adapted to enter either ofsaid openings and so form a firm connection of said arm with said clamp,especially when saidportion is brazed or soldered to said clamp. This is7 true alsoof the openings 10 in the bridge or bow 2 where a recess 13is formed on the face of the latter between said openings to receive aportion of the arm 3, similar to the portion 12, and hold said latterfirmly on the bridge or bow, this being assisted by brazing or solderingsaid portion to the bridge as 1n the previous case.

Attention is directed particularly to the fact that in each arm a wallrises from the base of the hook 5 forming the shoulder 1% whereby whenthe rubber dam is seatedon said hooks, said walls or shoulders 14prevent the dam from disengagement from said hooks and slipping down onthe arms toward the body of the clamp,

Owing to the shoulders 14 on the backs of the hooks, I avoid connectingthe exterior of the arms with cross bars, said shoulders assistingadmirably in retaining the rubber dam on the hooks since the bases ofthe hooks and shoulders form deep seated depressions into which thematerial of the rubber dam descends in reaching its place of occupationand so cannot slide outwardly over the hooks, nor inwardly over theshoulders, at what may be termed each corner of the device, it beingevident that when the dam is in position on the clamp it is tightlystretched on the arms owing to the flaring nature of the latter.

Hai'ing thus described my invention what I claim as new and desire tosecure by Let ters Patent, is

1. In a rubber dam clamp, a tooth clamping jaw, and an arm extendingoutwardly from the terminal of said jaw, said arm having on its outerend a downwardlyextending shoulder, and an upwardly extending hook,which latter extends from the base of said shoulder with a depressionbetween said shoulder and hook, the base of said depression beingadapted to receive the relative portion of the dam.

'2. In a rubber dam clamp, a jaw member thereof having an openingtherein, and an arm adapted to extend from said member and have itsinner terminal enter opening, the face of said member having a recesstherein extending from said opening adapting a portion of said arm to beseated therein, and a terminal thereof to occupy said opening.

FREEMAN H. NEW'LIN.

Witnesses D. S. BLACK, CLADYs NEWLIN.

Copies of this patent may be obtained for five cents each, by addressingthe fiommissioner of Patents, Washington, D; G.

